php ÉÏ´«Îļþ

//×îºÃÏȽ¨Á¢Ò»¸ö upload/publicÕâ¸öÎļþ¼Ð£¬ÒÔÏÂÊÇupload.php
<?php
/**
*********************************************
²ÎÊýÉ趨
*********************************************
**/
//×î´óÉÏ´«Îļþ´óС
$MAX_SIZE = 20000000;
//ÉèÖÃMineÀàÐÍ
$FILE_MIMES = array
('image/jpeg','image/jpg','image/gif','image/png','application/msword');
//ÉèÖÃÔÊÐíÉÏ´«µÄÎļþÀàÐÍ£¬°´ÕÕ¸ñʽÌí¼Ó
$FILE_POSTFIX = array
('.zip','.jpg','.png','.gif','.wma','.rm','.wmv','.doc','.mpeg','.mp3','.avi');
//ÊÇ·ñÔÊÐíɾ³ýÒÔÉÏ´«µÄÎļþ£¬ÔÊÐí:yes; ²»ÔÊÐí:no;
$DELETE_ENABLE = 'yes';
/**
*********************************************
±äÁ¿É趨
*********************************************
**/
$site_name = $_SERVER['HTTP_HOST'];
$site_url = "http://".$site_name.dirname($_SERVER['PHP_SELF']);
$site_this = "http://".$site_name.$_SERVER['PHP_SELF'];
//¿É¼ûÐÔ£¬Îª0ʱֻÓлáÔ±¿É¼û£¬Îª1ʱËùÓÐÈËÔ±¶¼¿É¼û
$visibility = true;
if($visibility)
{
 $upload_dir = "upload/public/";
}else
{
 $upload_dir = "upload/private/";
}
$upload_url = $site_url."/".$upload_dir;
/**
*********************************************
´´½¨ÉÏ´«Ä¿Â¼
*********************************************
**/
if(!is_dir($upload_dir))
{
 if(!mkdir($upload_dir))
  die('ÎļþûÓд´½¨³É¹¦£¡£¡');
 if (!chmod($upload_dir,0777))
  die ("¸Ä±äȨÏÞʧ°Ü.");
}
/**
*********************************************
ɾ³ýÎļþ´¦Àí
*********************************************
**/
if($del && $DELETE_ENABLE == 'yes')
{
 $resourse = fopen('log.txt','a');
 fwrite($resourse,date('Y-m-d H:i:s')."ɾ³ý - ɾ³ý²Ù×÷µÄipµØַΪ: $_SERVER[REMOTE_ADDR]".$del."\n");
 $result = unlink($del);
 if(!$result)
 {
  echo "ɾ³ý²Ù×÷ʧ°Ü£¬ÇëÖØÊÔ";
  echo "<meta http-equiv=\"refresh\"content=\"1;url=upload.php\">";
  exit;
 }else
 {
  echo "ɾ³ý²Ù×÷³É¹¦£¡·µ»Ø";
  echo "<meta http-equiv=\"refresh\"content=\"1;url=upload.php\">";
  exit;
&nb